package net.scratch.netty.net.codec;

import net.scratch.netty.util.PacketBuffer;

import org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.channel.Channel;
import org.jboss.netty.channel.ChannelHandlerContext;
import org.jboss.netty.handler.codec.frame.FrameDecoder;

public class UpdateServerDecoder extends FrameDecoder {

	public static final int[] CRC_508 = { 0xff, 0x00, 0xff, 0x00, 0x00, 0x00,
		0x00, 0xd8, 0x84, 0xa1, 0xa1, 0x2b, 0x00, 0x00, 0x00, 0xba, 0x58,
		0x64, 0xe8, 0x14, 0x00, 0x00, 0x00, 0x7b, 0xcc, 0xa0, 0x7e, 0x23,
		0x00, 0x00, 0x00, 0x48, 0x20, 0x0e, 0xe3, 0x6e, 0x00, 0x00, 0x01,
		0x88, 0xec, 0x0d, 0x58, 0xed, 0x00, 0x00, 0x00, 0x71, 0xb9, 0x4c,
		0xc0, 0x50, 0x00, 0x00, 0x01, 0x8b, 0x5b, 0x61, 0x79, 0x20, 0x00,
		0x00, 0x00, 0x0c, 0x0c, 0x69, 0xb1, 0xc8, 0x00, 0x00, 0x02, 0x31,
		0xc8, 0x56, 0x67, 0x52, 0x00, 0x00, 0x00, 0x69, 0x78, 0x17, 0x7b,
		0xe2, 0x00, 0x00, 0x00, 0xc3, 0x29, 0x76, 0x27, 0x6a, 0x00, 0x00,
		0x00, 0x05, 0x44, 0xe7, 0x75, 0xcb, 0x00, 0x00, 0x00, 0x08, 0x7d,
		0x21, 0x80, 0xd5, 0x00, 0x00, 0x01, 0x58, 0xeb, 0x7d, 0x49, 0x8e,
		0x00, 0x00, 0x00, 0x0c, 0xf4, 0xdf, 0xd6, 0x4d, 0x00, 0x00, 0x00,
		0x18, 0xec, 0x33, 0x31, 0x7e, 0x00, 0x00, 0x00, 0x01, 0xf7, 0x7a,
		0x09, 0xe3, 0x00, 0x00, 0x00, 0xd7, 0xe6, 0xa7, 0xa5, 0x18, 0x00,
		0x00, 0x00, 0x45, 0xb5, 0x0a, 0xe0, 0x64, 0x00, 0x00, 0x00, 0x75,
		0xba, 0xf2, 0xa2, 0xb9, 0x00, 0x00, 0x00, 0x5f, 0x31, 0xff, 0xfd,
		0x16, 0x00, 0x00, 0x01, 0x48, 0x03, 0xf5, 0x55, 0xab, 0x00, 0x00,
		0x00, 0x1e, 0x85, 0x03, 0x5e, 0xa7, 0x00, 0x00, 0x00, 0x23, 0x4e,
		0x81, 0xae, 0x7d, 0x00, 0x00, 0x00, 0x18, 0x67, 0x07, 0x33, 0xe3,
		0x00, 0x00, 0x00, 0x14, 0xab, 0x81, 0x05, 0xac, 0x00, 0x00, 0x00,
		0x03, 0x24, 0x75, 0x85, 0x14, 0x00, 0x00, 0x00, 0x36 };

	@Override
	protected Object decode(ChannelHandlerContext ctx, Channel channel,
			ChannelBuffer buffer) throws Exception {
		PacketBuffer pBuffer = new PacketBuffer();
		if (buffer.readableBytes() >= 4) {
			buffer.skipBytes(4);
			for (int i : CRC_508) 
				pBuffer.put((byte) i);
		}
		channel.write(pBuffer.toPacket());
		return null;
	}

}

